<template>
  <el-dialog
    ref="xhzqDialog"
    v-dialogDrag
    z-index="1000"
    class="xhzqDialog"
    :fullscreen="dataIsfullscreen"
    :visible.sync="dialogVisible"
    :append-to-body="true"
    :close-on-click-modal="false"
    :show-close="false"
    v-bind="param"
  >
    <div slot="title" class="medium">
      <div class="centers">
        <span>{{ param.title }}</span>
      </div>
      <div class="icons">
        <i
          class="el-icon-full-screen"
          style="font-size: 24px"
          @click="IsFullscreen"
        />
        <i
          class="el-icon-close"
          style="font-size: 24px"
          @click="handleClose"
        />
      </div>
    </div>

    <div class="dialogBody">
      <slot />
    </div>
    <div class="dialogFooter">
      <slot name="footer" solt="footer" />
    </div>
  </el-dialog>
</template>

<script>
export default {
  name: 'WangDialogDrag',
  directives: {
    dialogDrag: {
      bind(el, binding, vnode, oldVnode) {
        const dialogHeaderEl = el.querySelector('.el-dialog__header')
        const dragDom = el.querySelector('.el-dialog')
        dialogHeaderEl.style.cursor = 'move'
        // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
        const sty =
          dragDom.currentStyle || window.getComputedStyle(dragDom, null)
        // const fixedX =
        // const fixedY =
        dialogHeaderEl.onmousedown = (e) => {
          // 判断当前是否为全屏状态
          const path =
            event.path || (event.composedPath && event.composedPath())
          const isFull = path.find((s) => {
            if (s.className === undefined) {
              return false
            } else {
              return s.className.indexOf('is-fullscreen') > -1
            }
          })
          if (isFull !== undefined) {
            return
          }
          const isMinix = path.find((s) => {
            if (s.className === undefined) {
              return false
            } else {
            }
          })
          if (isMinix !== undefined) {
            return
          }
          // 鼠标按下，计算当前元素距离可视区的距离
          const disX = e.clientX - dialogHeaderEl.offsetLeft
          const disY = e.clientY - dialogHeaderEl.offsetTop

          // 获取到的值带px 正则匹配替换
          let styL, styT

          // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
          if (sty.left.includes('%')) {
            styL =
              +document.body.clientWidth * (+sty.left.replace(/\%/g, '') / 100)
            styT =
              +document.body.clientHeight * (+sty.top.replace(/\%/g, '') / 100)
          } else {
            styL = +sty.left.replace('px', '')
            styT = +sty.top.replace('px', '')
          }

          document.onmousemove = function(e) {
            // 通过事件委托，计算移动的距离
            const l = e.clientX - disX
            const t = e.clientY - disY
            // 移动当前元素
            dragDom.style.left = `${l + styL}px`
            dragDom.style.top = `${t + styT}px`
            // const dom = e.path.find(s => s.querySelector('.el-dialog')).children[0]
            //
            // if (dom.offsetTop < 0) {
            //   dragDom.style.top = `0px`
            // }
            // if (dom.offsetLeft < 0) {
            //   dragDom.style.left = `0px`
            // }

            // 将此时的位置传出去
            // binding.value({x:e.pageX,y:e.pageY})
          }

          document.onmouseup = function(e) {
            const dragDom = el.querySelector('.el-dialog')
            const offsetLeft = dragDom.offsetLeft
            const offsetTop = dragDom.offsetTop
            const left = Number(dragDom.style.left.replace('px', ''))
            const top = Number(dragDom.style.top.replace('px', ''))
            const windowWidth = window.innerWidth
            const windowHeight = window.innerHeight - 50
            const offsetRight = offsetLeft + dragDom.offsetWidth - windowWidth
            const offsetBottom =
              offsetTop + dragDom.offsetHeight - windowHeight
            if (offsetLeft < 0) {
              dragDom.style.left = left - offsetLeft + 'px'
            }
            if (offsetTop < 0) {
              dragDom.style.top = top - offsetTop + 'px'
            }
            if (offsetRight > 0) {
              dragDom.style.left = left - offsetRight + 'px'
            }
            if (offsetBottom > 0) {
              dragDom.style.top = top - offsetBottom + 'px'
            }
            document.onmousemove = null
            document.onmouseup = null
          }
        }
      }
    }
  },
  props: {
    param: {
      type: Object,
      default: () => {}
    },
    isFooter: {
      // 是否显示脚部
      type: Boolean,
      default: true
    },
    dialogVisible: {
      type: Boolean,
      default: false
    },
    isfullscreen: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      dataIsfullscreen: this.isfullscreen
    }
  },
  watch: {
    dialogVisible(val) {
      if (val) {
        const el = this.$refs.xhzqDialog.$el.querySelector('.el-dialog')
        el.style.left = 0
        el.style.top = 0
      }
    }
  },
  methods: {
    handleClose() {
      this.$emit('handleClose')
    },

    // 全屏
    IsFullscreen() {
      this.dataIsfullscreen = !this.dataIsfullscreen
    }
  }
}
</script>

<style lang="scss">
.el-dialog {
  margin-top: 10vh !important;
}
.no_select {
  -webkit-touch-callout: none; /* iOS Safari */
  -webkit-user-select: none; /* Chrome/Safari/Opera */
  -khtml-user-select: none; /* Konqueror */
  -moz-user-select: none; /* Firefox */
  -ms-user-select: none; /* Internet Explorer/Edge */
  user-select: none; /* Non-prefixed version, currently */
}

.xhzqDialog {
  .is-fullscreen {
    width: 100% !important;
    left: 0 !important;
    top: 0 !important;
    margin-top: 0 !important;
    overflow: hidden;
    position: relative;
    .el-dialog__header {
      cursor: auto !important;
    }
    .el-dialog__body {
      height: 100%;
      .dialogBody {
        height: 100% !important;
        max-height: none !important;
        padding-bottom: 120px !important;
      }
    }
    .dialogFooter {
      position: absolute;
      bottom: 0;
      width: 100%;
      background: #fff;
    }
  }
  .el-dialog {
    .el-dialog__header {
      // width: 100%;
      padding: 15px 20px !important;
      display: flex;
      font-weight: normal;
      border-bottom: 1px solid #ccc;
      @extend .no_select;
      cursor: auto;
      .medium {
        width: 100%;
        height: 100%;
        display: flex;
        div {
          flex: 1;
        }
        .centers {
          span {
            font-size: 18px;
            color: #606266;
          }
        }
        .icons {
          display: flex;
          justify-content: flex-end;
          i {
            color: #5f6368;
            font-size: 18px !important;
            display: block;
            padding: 4px 7px;
          }
          i:hover {
            background: #dcdfe6;
            cursor: pointer;
          }
          .el-icon-close:hover {
            background: #f00;
            color: #fff;
          }
        }
      }
      .horn {
        width: 100%;
        height: 100%;
        display: flex;
        justify-content: space-between;
        div {
          i {
            color: #5f6368;
            font-size: 20px !important;
          }
        }
        .lefts {
          flex: 4;
          margin-top: 3px;
          overflow: hidden;
          text-overflow: ellipsis;
          white-space: nowrap;
          span {
            font-size: 16px;
            color: #606266;
          }
        }
        .centers {
          flex: 1;
        }
        .rights {
          flex: 1;
        }
        i:hover {
          cursor: pointer;
          color: #000;
        }
      }
      .el-dialog__headerbtn {
        top: 0;
        font-size: 24px;
      }
    }
    .el-dialog__body {
      padding: 1px !important;
      .dialogBody {
        max-height: calc(80vh - 50px);
        overflow: auto;
        padding: 20px 25px 20px;
        &::-webkit-scrollbar {
          width: 4px;
          height: 8px;
        }
        &::-webkit-scrollbar-thumb {
          background: transparent;
          border-radius: 4px;
        }
        &:hover::-webkit-scrollbar-thumb {
          background: hsla(0, 0%, 53%, 0.4);
        }
        &:hover::-webkit-scrollbar-track {
          background: hsla(0, 0%, 53%, 0.1);
        }
      }
      .dialogFooter {
        padding: 10px 15px;
        border-top: 1px solid #ccc;
        text-align: right;
        .el-button {
          padding: 7px 15px;
        }
      }
    }
  }
  .xhzqDialog {
    // display: flex;
    // justify-content: center;
    .el-select {
      width: 100%;
    }
    .el-date-editor {
      width: 100%;
    }
  }
}
</style>
